CSKA Sofia coach Hristo Yanev called for more tolerance from his club's fans after ugly scenes marred their friendly against Israeli side Ashdod.
After a red card to a visiting player, fans invaded the pitch, attacking the Israelis and chasing them from the field.
The fans' actions were believed to be in response to perceived unfair physicality from Ashdod players.
CSKA, Bulgaria's most decorated club, have been demoted to the third-tier due to a financial crisis.
"Unpleasant situation, but we must understand that in group B will have a much more unpleasant situations," he was quoted as saying by sportal.bg.
"My appeal to people who have our backs and support us is to respect and have more tolerance. Constantly say that should pay attention to the games ahead and take the necessary measures."
